Treatment try of simulated agricultural surface runoff pollution by using a novel biomass concentrator reactor. (15th February 2022)

• Record Type: Journal Article
• Authors: Zhang, Ke; Qing, Jing; Chen, Yuanye; Liu, Xiaoling; Fu, Xiaoying; Jiang, Bing; Luo, Hongbing; Yang, Jinping; Xue, Ru; Anderson, Bruce C.; Li, Mei; Li, Xiaoting; Chen, Wei; Fan, Liangqian; Zhang, Xiaohong
• Is Part Of: Journal of environmental management. Volume 304(2022)
• Publication Date: 2022-02-15
• Subjects: Simulated agricultural surface runoff pollution -- Biomass concentrator reactor (BCR) -- Start up -- Denitrification -- Phosphate removal; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2021.114272
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Increased agricultural surface runoff in rural watersheds is a leading cause of nonpoint source pollution. In this study, a new biomass concentrator reactor (BCR) is conducted to degrade simulated agricultural surface runoff for both start-up process and treatment process. The results show that both in the start-up phase and in the stable phase, BCR had a good degradation effect on simulated agricultural surface runoff. Within 13 days–15 days of completed start-up of BCR, degradation of COD can be considered to the first-order kinetics: ln C t = ln C 0 − 0.1377 t (R 2 = 0.78). During the stabilization phase, the average removal rate of COD, NH4 + -N, NO3 − -N, TN and TP from the effluents through the BCR membrane was 94.58%, 85.79%, 53.58%, 37.87%, and 60.62%, respectively, which was increased by 7.4%, 2.5%, 5.1%, 0.18% and 11.4%, respectively, compared to control experiment which the effluents without membrane. The pollutants degradation by BCR in stable phase show a partly relative model of Lawrence-McCarty equation, which the nitrogen and phosphorus degradation is v N = ( 4.1 + S ) / ( 2.53 × S ) (R 2 = 0.69) and v P = ( 8.78 + S ) / ( 3.0 × S ) (R 2 = 0.67), respectively. In the stable phase, the operation cost of BCR is about $0.08/(Ld). Future research on improved BCR maybe focus on the membrane pollution and cleaning, optimized operation conditions, new materials of membrane. Highlights: Designed a novel partition biomass concentrator reactor (BCR). The start-up period of the BCR was 15 days. Adding BCR membrane can increase TP removal rate by 11.45%. COD removal efficiency was over 90%. TP removal rate was over 60%.